I understand what you all are saying. It would appear that things are "changing". However, I don't keep up with every little detail of what Apple is doing on a daily basis with the OS and I find it frustrating to have to ask these kinds of questions because, for all of my searching, I have not found a discussion about what method one should or should not use and what is heading for obsolescence. I have only discovered that this didn't work by trial and error, not by anything that the RB documentation said.

So I guess the consensus here is to NOT use extension filtering for Mac OS, but MacType.

Jeff J.


On Apr 16, 2006, at 6:27 PM, Charles Yeomans wrote:

This is consistent. Though Apple appears to be slowly deprecating it, MacOS files have a creator and a type. Each is a four-byte string. The type of an application is "APPL", and this is the MacType property to which the code below refers.

Charles Yeomans

On Apr 16, 2006, at 7:18 PM, Jeff Justice wrote:

Yes, I wound up doing this. My question, though, is if extension filtering doesn't work for ".app", how can I expect it to work for ".jpg", ".png" etc?

Frustrating for a relative newbie to try and figure out the consistency (or lack of) in programming this stuff.

Jeff J.


On Apr 16, 2006, at 6:11 PM, John McKernon wrote:

   AppTypes.MacType="APP"

If you change this to "APPL", you'll have the official Apple- designated Mac
type, and everything else should work fine.

- John
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